I'm not the sign company owner but I spoke to him. It didn't sound like he had more than an approved estimate - no disclaimer that said they had the legal right to remove the signage. I think he wrongly assumed it was going to be the same as it had with the big companies...
Going to reply here since I think this gets to the heart of the mater (standard internet expert disclaimer applies ).
Does getting a note from the the franchisor absolve you from any legal issues here? Its kind of like "well this guy hired me me to break this other guy's kneecaps, see I have note that says he really does owe him money".
So whether or not there was just a phone call or a fully filled out work order I don't think it makes a difference.
This is not like repoing a car or a house since these two items of property have special ownership laws already out there. The franchisor owns the IP of the sign but the franchisee paid for and owns the materials it was made from. Is there an enforceable clause in their contract that says any thing with the franchisor's logo on it they own?
Love to hear the outcome.